Internet Runs Slow with Router but not Modem

[Hishighness]

Hey all, Just like to say thanks for this forum, it's a great resource.

I stumbled upon this thread

http://forums.speedguide.net/showthread.php?t=220227

And I have pretty much the same problem. My internet runs slowly when connected to the router, but fine when connected directly to the Modem.

I read in the thread that you got the other guy to post a report from this site http://miranda.ctd.anl.gov:7123/ So I will as well.

TCP/Web100 Network Diagnostic Tool v5.5.1
click START to begin
Connected to: miranda.ctd.anl.gov  --  Using IPv4 address
Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 966.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 1.76Mb/s
The slowest link in the end-to-end path is a 10 Mbps Ethernet subnet

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 966.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 1.76Mb/s

	------  Client System Details  ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.6.0_02

	------  Web100 Detailed Analysis  ------
10 Mbps Ethernet link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 66.33 msec; the Packet size = 1380 Bytes; and 
There were 7 packets retransmitted, 197 duplicate acks received, and 21 SACK blocks received
The connection stalled 2 times due to packet loss
The connection was idle 0.53 seconds (5.30%) of the time
C2S throughput test: Packet queuing detected: 0.76%
S2C throughput test: Packet queuing detected: 5.29%
This connection is receiver limited 73.9% of the time.
  Increasing the the client's receive buffer (16.0 KB) will improve performance
This connection is sender limited 1.71% of the time.
This connection is network limited 24.39% of the time.

Web100 reports TCP negotiated the optional Performance Settings to: 
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF

Server 'miranda.ctd.anl.gov' is probably behind a firewall. [Connection to the ephemeral port failed]
Client is probably behind a firewall. [Connection to the ephemeral port failed]
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
	Server says [24.224.202.13] but Client says [192.168.0.2]

I'm using a Netgear MR814 v3 Router and a Motorola SB5101 Modem with Windows XP Pro as my OS.

Thanks for your time,
H²

[mccoffee]

Try upgrading the firmware on the router if there is a wan link duplex speed change it to 100full if it doesn't have a wan port speed it could be that wan port is only 10mb not 100.

[trogers]

The connection stalled 2 times due to packet loss

Probably 2 problems:

Untweaked TCP settings (MSS is at only 1380), and

Electircal interference on the signal device(s)

[BradEUK]

Hello,

I guess it's more to do with the Router firewall of Firmware.

Regards